Most common precipitant of contact dermatitis is: (LQ)
Allergic contact dermatitis is an eczematous condition that develops after contact with an agent to which delayed hypersensitivity has developed. An enormous number of substances are capable of causing allergic contact dermatitis and nickel dermatitis is one of the most common examples.
Extra Edge: CONTACT DERMATITIS
1). Inflammatory process due to exogenous agent.
2). M/c presentation: hand eczema (which is related to occupational exposure).
3). Delayed type of HS reaction type 4 (mediated by memory T-cell in skin).
4). T/t: potent Glucocorticoids (esp. fluorinated) Topically.
5). D/g: Patch test (for Allergic CD).
Scratch testing with latex or RAST (for irritant CD / Hand eczems).